Electric terminal connection



Jan 251940 M. P. HANsoN ELECTRIC TERMINAL CONNECTION Filed Nov. 4, 1938 mvENToR MALCOLM P. HANSON ww/K ATTORNEY QQQQQQQQQQQQQQQQQQQQQQQQ.

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Patented Jan. v2,

UNITED STATES PATENT OFFICE ELECTRIC TERMINAL CONNECTION Malcolm P. Hanson, Hyattsville, Md.

Application November 4, 1938, Serial No. 238,733

3 claims. (ci. 113-328) (Granted under the act of March 3, 1883, as amended April 30. 1928; 370 0. G. 757) This invention relates to electric terminal connections and it has a particular relation to disconnectible terminals for electric conductors.

One of the objects of the present invention is the provision of a terminal, of the character described, which will provide a very secure anchorage for the attached conductor and one which cannot become loose and also a terminal which may be secured to a relatively stiff stranded wire conductor with a minimum of effort. The present terminal is particularly adaptable for use in airplanesand other installations subject to continuous or prolonged vibration.

With these and other objects in view, as well 16 as other advantages that may be incident to the use of the improvements, the invention consists in the parts and combinations thereof hereinafter set forth and claimed, with the understanding that the several necessary elements con- M stituting the same may be -varied in proportion and arrangement without departing from the nature and scope of the invention, as deiined in the appended claims.

In order to make the invention more clearly 26 understood, there are shown in the accompanying drawing, means for carrying the invention into practical use, without limiting the improvements in theiruseful application to the particular construction, which, for the purpose of explana- 80 tion, have been made the subject of illustration.

' In the accompanying drawing:

Fig. 1 is an enlarged side elevational view of a terminal of the plug type embodying the invention, with the parts separated and prior to clamping the wire conductor therein;

Fig. 2 is a longitudinal sectional view through the terminal with the parts in the positions they occupy just after the conductor has been engaged by .the ferrule and priorto being wrapped and clamped thereto;

Fig. 3 is a view partly in side elevation and partly in longitudinal section showing the .final position of the parts with the conductor wrapped, clamped and housed thereby; and

Fig.l 4 is a side elevational view of another form of clamping ferrule adapted for use with the present terminal structure.

Referring to the drawing, a conductor terminal lo! the plug type constructedin accordance with the invention is shown as comprising an exteriorly screw threaded nipple III .formed with a shoulder Il against which a collar I2 is clamped'by upsetting the edges of a recessed end I3 of the nipple (Fig. 2). A cylindrical cup or socket I4 and cooperating contact members I5 are also clamped to the nipple I0 between the collar I2 and the upset end I3, the free ends ofthe contact members being inwardly curved and projecting through openings I6 in the socket for frictional engagementcwith a cooperating terminal plug, 5 not shown.,`

I'he nipple I0 is provided with' an axial bore I'I which communicates with a bore I8 extending at an angle thereto and opening through a cylindrical neck portion I9 of the nipple adjacent t0 10 the collar I2. 'I'he uninsulated or exposed end of a Wire conductor 20 extends through the axial portion I'I of the bore and thence radially outwardly through the angularly extending bore I8 and is secured in position by means of a 15 knurled ferrule or cap 2| which is screw threaded onto the nipple I0. The forward end of the ferrule 2l is formed with a recess 22 the walls of which are notched at intervals, as indicated at 23.

When the conductor is secured to the terminal go it is iirst threaded through the ferrule 2| and thence through the bores I I and I8 in the nipple I0, so as to leave a short length thereof extending radially outwardly from the latter, as shown in Fig. l. The'ferrule 2i is then screwed onto g5 the nipple until the radially extending portion of the conductor is caught within. one of the notches 23 in the ferrule, as shown in Fig. 2. Continued rotation ofthe ferrule 2| will wrap the outwardly extending 'end of the conductor 30 20 around the neck I Biof the nipple until it is t entirely withdrawnthrough the notch 23 and into the 'recess 22 of the ferrule and clamped against the collar 'I2 without injury to the fingers. When this occurs the notches 23 will overlie the 35 collar I2 and be ynclosed thereby, the wrapped end of the cable being completely housed within recess 22 of the ferrule, asshown in Fig. 3. The extreme end of the conductor, through its resiliency, bears against the wall of the recess 22 40 and will catch in the notches 23 therein with a ratchet action, thus resisting any tendency for the ierrule to unscrew.

In Fig. 4 there is shown another type of ferrule in which notches 24 are formed in the wall of 45 the recess 22 by extruding-portlons thereof. The action of this form of ferrule is the same as that hereinabove described in connection with Figs. 1 to 3. 1

It will be understood lthat the above description' 50 and accompanying drawing comprehend only the general and preferred embodiment of the invention and that various changes in construction, proportion and arrangement of the parts may be made within the scope of the appended claims u without sacricing any oi' the advantages of the invention.

The invention described herein may be manufactured and/or used by or for the Government of the United States of America for governmental purposes Without the payment of any royalties thereon or therefor.

I claim:

1. A terminal connection for electrical conduc- 0 tors comprising a nipple having contact means for detachable connection with another terminalr and formed with a shoulder and with a bore extending therethrough opening at its forward end through the side of the nipple adjacent to said shoulder; and a cup-shaped ferrule screw threaded onto said nipple and having a notch formed in the forward edge of the wall thereof adapted to engage the end of an electric conductor extending through said bore and radially out of the forward end thereof, and to wrap the same about said nipple when said ferrule is screwed onto said nipple, said ferrule being adapted to clamp the Wrapped portion of said conductor against said shoulder and said shoulder g5 being adapted to enter said ferrule and close the notch therein.

2. A terminalq connection forVv electrical conductors comprising a nipple having contact means for detachable connection with another termi- 30 nal and formed with/a. shoulder and with a bore extending therethrough opening at itsforward end through the side of the nipple adjacent to said shoulder; l and a ferrule screw threaded onto said nipple and having a recess formed in the for ward end thereof and a notch in the edge of the forward Wall of said recess, said notch being adapted to engage the end or' an electric conductor extending through said bore and radiaiiy out of the forward end thereof, and to Wrap the same about saidv vnipple, Vwhen said ferruie is screwed onto said nipple, said ierruie being adapted to clamp the wrapped portion of said conductor within said recess and against said* i shoulder and said shoulder being adapted to enter said recess and close the notch therein.

3.',A'termina1'connection for electrical con- `ducrtors comprising a nipple having contact,

and a ferruie screw of the forward end thereof and to wrap the same l about said nipple when said frerrule is screwed onto said nipple, said i'errule being adapted to clamp the wrapped portion of said conductor `within said recess and againsty said shoulder.

MALCOLM P. HANSOISL 

